Cannot Amend Wrongly Entered User Name On Windows Authentication

I was in an urgent to RDP to a Windows 2008 server from my Windows 7 machine and misspelled the user name.  Instead of deinfotech\administrator, I entered deinfotech\administartor.  I hit the enter key and got a “Your credential did not work” message.  Here comes the frustration.

Instead of giving a chance for me to amend the user name, I have to re-enter the whole user name.

Maybe I am just being critical but when I am in a rush, I find this really annoying.